virtual void on_resize(int cx, int cy) { generate_alpha_mask(cx, cy); }
unsigned render() { pixfmt_type pf(rbuf_window()); agg::renderer_base<pixfmt_type> rb(pf); agg::renderer_scanline_aa_solid<agg::renderer_base<pixfmt_type> > ren(rb); switch(m_polygons.cur_item()) { case 0: { //------------------------------------ // Two simple paths // agg::path_storage ps1; agg::path_storage ps2; double x = m_x - initial_width()/2 + 100; double y = m_y - initial_height()/2 + 100; ps1.move_to(x+140, y+145); ps1.line_to(x+225, y+44); ps1.line_to(x+296, y+219); ps1.close_polygon(); ps1.line_to(x+226, y+289); ps1.line_to(x+82, y+292); ps1.move_to(x+220, y+222); ps1.line_to(x+363, y+249); ps1.line_to(x+265, y+331); ps1.move_to(x+242, y+243); ps1.line_to(x+268, y+309); ps1.line_to(x+325, y+261); ps1.move_to(x+259, y+259); ps1.line_to(x+273, y+288); ps1.line_to(x+298, y+266); ps2.move_to(100+32, 100+77); ps2.line_to(100+473, 100+263); ps2.line_to(100+351, 100+290); ps2.line_to(100+354, 100+374); m_ras.reset(); m_ras.add_path(ps1); ren.color(agg::rgba(0, 0, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); m_ras.reset(); m_ras.add_path(ps2); ren.color(agg::rgba(0, 0.6, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); generate_alpha_mask(ps1); perform_rendering(ps2); } break; case 1: { //------------------------------------ // Closed stroke // agg::path_storage ps1; agg::path_storage ps2; agg::conv_stroke<agg::path_storage> stroke(ps2); stroke.width(10.0); double x = m_x - initial_width()/2 + 100; double y = m_y - initial_height()/2 + 100; ps1.move_to(x+140, y+145); ps1.line_to(x+225, y+44); ps1.line_to(x+296, y+219); ps1.close_polygon(); ps1.line_to(x+226, y+289); ps1.line_to(x+82, y+292); ps1.move_to(x+220-50, y+222); ps1.line_to(x+265-50, y+331); ps1.line_to(x+363-50, y+249); ps1.close_polygon(agg::path_flags_ccw); ps2.move_to(100+32, 100+77); ps2.line_to(100+473, 100+263); ps2.line_to(100+351, 100+290); ps2.line_to(100+354, 100+374); ps2.close_polygon(); m_ras.reset(); m_ras.add_path(ps1); ren.color(agg::rgba(0, 0, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); m_ras.reset(); m_ras.add_path(stroke); ren.color(agg::rgba(0, 0.6, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); generate_alpha_mask(ps1); perform_rendering(stroke); } break; case 2: { //------------------------------------ // Great Britain and Arrows // agg::path_storage gb_poly; agg::path_storage arrows; make_gb_poly(gb_poly); make_arrows(arrows); agg::trans_affine mtx1; agg::trans_affine mtx2; mtx1 *= agg::trans_affine_translation(-1150, -1150); mtx1 *= agg::trans_affine_scaling(2.0); mtx2 = mtx1; mtx2 *= agg::trans_affine_translation(m_x - initial_width()/2, m_y - initial_height()/2); agg::conv_transform<agg::path_storage> trans_gb_poly(gb_poly, mtx1); agg::conv_transform<agg::path_storage> trans_arrows(arrows, mtx2); m_ras.add_path(trans_gb_poly); ren.color(agg::rgba(0.5, 0.5, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); agg::conv_stroke<agg::conv_transform<agg::path_storage> > stroke_gb_poly(trans_gb_poly); stroke_gb_poly.width(0.1); m_ras.add_path(stroke_gb_poly); ren.color(agg::rgba(0, 0, 0)); agg::render_scanlines(m_ras, m_sl, ren); m_ras.add_path(trans_arrows); ren.color(agg::rgba(0.0, 0.5, 0.5, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); generate_alpha_mask(trans_gb_poly); perform_rendering(trans_arrows); } break; case 3: { //------------------------------------ // Great Britain and a Spiral // spiral sp(m_x, m_y, 10, 150, 30, 0.0); agg::conv_stroke<spiral> stroke(sp); stroke.width(15.0); agg::path_storage gb_poly; make_gb_poly(gb_poly); agg::trans_affine mtx; mtx *= agg::trans_affine_translation(-1150, -1150); mtx *= agg::trans_affine_scaling(2.0); agg::conv_transform<agg::path_storage> trans_gb_poly(gb_poly, mtx); m_ras.add_path(trans_gb_poly); ren.color(agg::rgba(0.5, 0.5, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); agg::conv_stroke<agg::conv_transform<agg::path_storage> > stroke_gb_poly(trans_gb_poly); stroke_gb_poly.width(0.1); m_ras.add_path(stroke_gb_poly); ren.color(agg::rgba(0, 0, 0)); agg::render_scanlines(m_ras, m_sl, ren); m_ras.add_path(stroke); ren.color(agg::rgba(0.0, 0.5, 0.5, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); generate_alpha_mask(trans_gb_poly); perform_rendering(stroke); } break; case 4: { //------------------------------------ // Spiral and glyph // spiral sp(m_x, m_y, 10, 150, 30, 0.0); agg::conv_stroke<spiral> stroke(sp); stroke.width(15.0); agg::path_storage glyph; glyph.move_to(28.47, 6.45); glyph.curve3(21.58, 1.12, 19.82, 0.29); glyph.curve3(17.19, -0.93, 14.21, -0.93); glyph.curve3(9.57, -0.93, 6.57, 2.25); glyph.curve3(3.56, 5.42, 3.56, 10.60); glyph.curve3(3.56, 13.87, 5.03, 16.26); glyph.curve3(7.03, 19.58, 11.99, 22.51); glyph.curve3(16.94, 25.44, 28.47, 29.64); glyph.line_to(28.47, 31.40); glyph.curve3(28.47, 38.09, 26.34, 40.58); glyph.curve3(24.22, 43.07, 20.17, 43.07); glyph.curve3(17.09, 43.07, 15.28, 41.41); glyph.curve3(13.43, 39.75, 13.43, 37.60); glyph.line_to(13.53, 34.77); glyph.curve3(13.53, 32.52, 12.38, 31.30); glyph.curve3(11.23, 30.08, 9.38, 30.08); glyph.curve3(7.57, 30.08, 6.42, 31.35); glyph.curve3(5.27, 32.62, 5.27, 34.81); glyph.curve3(5.27, 39.01, 9.57, 42.53); glyph.curve3(13.87, 46.04, 21.63, 46.04); glyph.curve3(27.59, 46.04, 31.40, 44.04); glyph.curve3(34.28, 42.53, 35.64, 39.31); glyph.curve3(36.52, 37.21, 36.52, 30.71); glyph.line_to(36.52, 15.53); glyph.curve3(36.52, 9.13, 36.77, 7.69); glyph.curve3(37.01, 6.25, 37.57, 5.76); glyph.curve3(38.13, 5.27, 38.87, 5.27); glyph.curve3(39.65, 5.27, 40.23, 5.62); glyph.curve3(41.26, 6.25, 44.19, 9.18); glyph.line_to(44.19, 6.45); glyph.curve3(38.72, -0.88, 33.74, -0.88); glyph.curve3(31.35, -0.88, 29.93, 0.78); glyph.curve3(28.52, 2.44, 28.47, 6.45); glyph.close_polygon(); glyph.move_to(28.47, 9.62); glyph.line_to(28.47, 26.66); glyph.curve3(21.09, 23.73, 18.95, 22.51); glyph.curve3(15.09, 20.36, 13.43, 18.02); glyph.curve3(11.77, 15.67, 11.77, 12.89); glyph.curve3(11.77, 9.38, 13.87, 7.06); glyph.curve3(15.97, 4.74, 18.70, 4.74); glyph.curve3(22.41, 4.74, 28.47, 9.62); glyph.close_polygon(); agg::trans_affine mtx; mtx *= agg::trans_affine_scaling(4.0); mtx *= agg::trans_affine_translation(220, 200); agg::conv_transform<agg::path_storage> trans(glyph, mtx); agg::conv_curve<agg::conv_transform<agg::path_storage> > curve(trans); m_ras.reset(); m_ras.add_path(stroke); ren.color(agg::rgba(0, 0, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); m_ras.reset(); m_ras.add_path(curve); ren.color(agg::rgba(0, 0.6, 0, 0.1)); agg::render_scanlines(m_ras, m_sl, ren); generate_alpha_mask(stroke); perform_rendering(curve); } break; } return 0; }